Pressing machine



JuneyZZ 1926.

. 1,590,026 5. T. HART 'PRESSING MACHINE Filed June 18, 1924 2 Sheets-Sheet 1 INVENTOR.

A TTORNEY5 June 22 1926. 1,590,026

- s. T. HART PRESSING MACHINE Filed June 18 1924 2 Sheets-Sheet 2 v I I a O k t I I 3 v INVENTOR. E awx/ 7% 7 A TTORNEYS Patented June 22, 1926.

UNITED STATES SIMEON T. HART, F SYRACUSE, NEW YORK, .ASSIG'NOR, BY ASS IGNIVIEZNZLS,'

PATENT OFFICE.

{D0 LIBERTY NATIONAL BANK, TRUSTEE.

PRESQING MACHINE.

Application filed June 18, 1824. Serial N10. 720,854.

This invention relates to presses, such as garment and laundry presses, and has for its object a particularly simple and efiici-ent motion transmitting or toggle mechanism between the power lever and the movable element, or head of the press, by which mechanism the application of power to the press head can be effectively applied, only after a preliminary closing movement of the press head independently of the power mechanism, and by which shocks and jars and stalling and breaking of the machine is prevented in case the power is applied when the links are at or in the neighborhood of a dead center point, and also by which undue strains on the machine are prevented.

The invention consists in the novel fea: tures and in the combinations and nonstructions hereinafter set forth and claimed.

In describing this invention reference is bad to the accompanying drawings in which like characters designate corresponding parts in all the views.

Figure 1 is a side elevation of the machine embodying my invention.

Figure 2 is a detail view of one of the links and the toggle.

Figures 3 and iare views similar to Fig ures l and 2, part 3 being omitted, showing the position of the linkage when the chine is under final pressure and when the mechanism is at a nentral point.

This pressing machine comprises, generally, cooperating pressing elements .one of which is movable toward and from the other, and actuating means therefor, including a power member, toggle links, one being connected to the movable element and the other to the frame independently of the power member, and the latter including endwisely movable sections, and a spring for resisting -endw-ise mov m nt of th sections, and a connection between the power member and the toggle normally arranged when the press is open, in ineffective position, and arranged to be moved to efifective position by the preliminary closing of the press by the operator, independently of the power member.

I have here shown my invention as embodied in a standard form of garment and laundry press, comprising a stationary pressing element or buck 1, a movable pressing element or head 2 movable toward and from the buck 1, the buck 1 being mounted upo a br cket 3, which in tu n is mo ted upon the main frame 4..

The pressing elements and the frame may be of any suitable size and construction, the frame including legs or pedestals 5 .fl-nd .6;

Th head 2 is usually carried by a yoke or lei-{er 7 pivoted between its ends atYS to a standard 9 forming an extension of the rear leg 6 of the frame, the lever 7 extending fo wa dly and rearwardly and a rying the ead :2 on ts fro t arm, and a suitable counter weight 10 on its rear arm, The yoke 7 is also provided w th a h ndle 11 at its front end by means of which the head i preliminarily moved toward closed position.

The power m mber is u ually a'lover l2 pivoted between its ends at 13 to the frame near the base thereof, and near or in the verti al l ne f the pivo 8, the power l v also extending forwardly and rearwardly.

1ais a toggle link pivotally connected to the head 2 through the lever 7, being here shown as pivoted at '15 directly to the rear arm of the lever 7 and extending down.- -wardly thenefroin.

1-6 is a ogg li k pivoted at on en t 17 to t e link it, a a i other end o the fram ind pend tly of the pow lever, it being here illustrated as normally extending downwardly and forwardly from the link 14 when the press is open, and as pivoted on the same pivot 13 that the power leve is mounte his ink 1- oomprises eodwis y movable sectio s 18 and 1. slidable relatively to each other, one section as .18 having a guide a a plate 20 o one side thereof, and the other having a complemon al r b o gu e :21 s id ble i the guide 2. .Endwise movemen o he sooti ns 1.8 and 19 is agains th act o o a compr ssio spring 22, which th sts at o e e d against the shou de 23 0.11 t e s ction 1. and at its o er e d against a shoulder 24 on a rod .25 secured at 26 to the section .18 and ex ending th ough the s o l e 2 and th oug the Zsprin-gQZ, the rod having its end 25 guid d i ug 27 0.11 the se tion 1 i The connect ons be wee h P er l 1.2 and the toggle, co prise a li k 2 pi o ally co nected o e o arm o he po e lever .12., a d to the ogg e, i b i g o nneo. d to o e of the part i connec Joy a lost motion conn c ion, hich is a a ge to be taken up by th preliminary s osi-n-g of the press head 2 independently of the lever 12, that is, a preliminary closing movement by the operator effected by pulling down on the handle 11. The link 28 normally extends rearwardly horizontally in the same general direction as the toggle link 16, so that, it will idle during the preliminary closing movement or will idle if power is applied to the lever 12 before or during such preliminary closing movement. Preferably the links 28 is pivoted at 29 to the rear arm of the power lever 12, and is connected to an extension 30 of the link 14 by a pin and slot connection, the pin 31 being provided on the link 14 below the joint 17 of the toggle, and the slot 32 being provided in the link 28. Owing to the relative arrangement of the links 16 and 28, the link 28 is carried into a straightened or effective position before the toggle links 14 and 16 are in an effective straightened position; and hence, when power is applied to the power lever 12 when the link 28 is in straightened position, the toggle links 14 and 16 will be moved further into effective straightened position and apply pressure to the press head. The arrangement of the links 14, 16 and 28 is such that the link 28 does not come into effective position until the head 2 has been preliminarily brought down to a position close to the work on the buck 1, that is, to what is called a safety-first position.

The link 14 is provided with the usual adjustment for lengthening or shortening it to conform to the thickness of the work and the amount of pressure desired, and includes endwisely movable adjustable sections, which are adjusted by means of a wheel 33. As such adjustment by the wheel 33 is well known, further description is thought to be unnecessary.

In operation when the power lever 12 is depressed after the head has been preliminarily closed, the link 28 will cause the toggles 14 and 16 to move further toward their dead-center line and apply heavy pressure. In the event the lever 12 is depressed at any other time the link 28 will merely idle. If it is depressed when the head is but part way closed, the head 2 will open up under the influence of the weight 10, unless the operator is holding on to the handle 11. If this lever 12 is depressed when the links 14 and 16 are in a neutral point where the joint of the toggle will not move forwardly or rearwardly, the link 28 thrusting against or endwise on the link 14 owing to the pin 31 being at the inner or lower end of the slot 32, causes the sections of the link 16 to pull apart against the action of the spring 22 and thus avoid stalling of the machine, andthe motor, burning out of the motor and fuses, or breaking of parts. These links 14 and 16 may come into such neutral point when the head has not been brought quite down to the position it is intended to be brought by the preliminary closing movement, and the extensible link 16 at all times prevents stalling of the machine or breaking of the parts in case the adjustment of the links 14 and 16 with respect to such neutral or dead-center point is not accurate. Owing to the links 16 no controlling means for preventing the operation of the head 2 is necessary.

The power lever 12 may be actuated in any suitable manner, and as here illustrated it is actuated by an intermittently movable shaft 34 having an eccentric or cam 35 thereof coacting with face 36 on the front end of the lever 12, the shaft 34 being intermittently actuated from a constantly running electric motor 37, the shaft 38 of which is connected to the shaft 34 through suitable gearing and intermittent clutch mechanism located within the housing 39.

The clutch may be of the construction shown in application of Albert Glisson, Serial Number 683,151, filed December 28, 1923. The clutch is controlled by a handle 53.

The section 42 is shifted to its in position by means of a rock shaft suitably journalled in the case 39, and having a shifter arm 51 thrusting against the hub 52 of the section 42, a handle 53, Fig. 1, arranged on the front side of the machine and mounted on a rock shaft 54 and connections between the rock shaft 54 and the rock shaft 50, including links 55 and 56. Depression of the handle 53 causes the shaft 50 to be rocked and the arm 51 to thrust the clutch section 42 to carry the pins 43 into the holes 44 of the worm wheel 41, which is constantly rotating. This inward movement of the section 42 is against the action of the spring 49 and also of the lighter springs 48, in case the pins 43 are not alined with the holes 44. If the pins 43 are not alined with the holes 44, the springs 48 are compressed until the pins and holes come into alinement whereupon the springs 48 react and thrust the pressure ring 46 against the shoulders 47 on the pins 43, and move the pins into the holes 44.

The clutch is controlled in its periodic operation by a cam ring 57 supported concentrio with the shaft 34, by the casing 39, and followers 58 on the section 42. The cam is formed with diametrically opposite notches 59 and plane faces 60 and between the notches. Shifting of the handle 53 causes the shifter arm 51 to thrust the clutch section 42 inwardly or to the left, Fig. 3, and move the followers 58 out of the notches 59, and the pins 43 into the holes 44 of the driving worm wheel. As the shaft 34 begins its half revolution it carries the followers 58 on to the plane face 50, so that, the clutch is now held in its in position until the half revolution is completed, at

which time the followers 58 again come into alinement with the notches 59 and the clutch spring 49 thrusts the clutch section 42 out. As the ends of the pins are tapered they will be forced out of the holes at at this time.

The lever 12 is caused to follow the cam by a suitable spring 61.

The construction and operation of the driving clutch mechanism forms no part of this invention, it being sufiicient to bear in mind that the shaft 3 1: is intermittently movable and is connected to the power" manually, and disconnected automatically at the end of each half revolution.

Assuming that the parts are in the position shown, in Fig. 1, the operator first preliminarily closes the press, then operates the handle causing the shaft 34: to make a half revolution moving the eccentric 35 from its position shown in Fig. 1, during the half revolution, thus depressing the power lever 12 and applying pressure to the head 2. When the pressure has been applied as long as desired, the operator again presses the handle causing the clutch mechanism to connect the shaft 34 to the driving mechanism during another half revolution until the eccentric moves to its position shown in Fig. 1, and the parts are in their starting position.

ll hat I claim is:

1. A pressing machine comprising a frame, cooperating pressing elements, one movable toward and from the other, and actuating means for the movable pressing element, comprising a power member, a toggle comprising links pivotally connected respectively to the movable element and to the frame independently of the power member, the latter comprising endwisely movable sections and a spring for resisting such endwise movement, and a connection between the power member and the toggle normally arranged in ineffective position and movable into effective position by a preliminary closing movement of the movable element independently of the power member, said connection being connected to the toggle to move the toggle toward final straightened position and to extend the sectional toggle link against the action of its spring when the straightening movement of the toggle is obstructed before the toggle reaches its straightened position.

2. A pressing machine, comprising a frame, cooperating pressing elements carried by the frame, a forwardly and rearwardly extending lever supporting the movable element, said lever being pivoted between its ends to the frame, a forwardly and rearwardly extending power lever pivoted between its ends to the frame below the power member, a toggle comprising a link pivoted to the rear arm of the first lever and extend ing downwardly therefrom, and a second link pivoted to the first link and to the frame, and normally extending downwardly and forwardly from the first link, the second link comprising endwisely movable sections and a spring for resisting endwise movement of the sections, and a link pivoted to the rear arm of the power lever in the rear of the pivot of the second link, and to the first link below the joint of the toggle, it being connected to one of the parts it connects by a lost motion connection.

In testimony whereof, I have hereunto signed my name, at Syracuse, in the county of Onondaga, and in the State of New York, this lth day of June, 1924.

SIMEON T. HARTa 

